Carburising is a carbon diffusion controlled process used to case harden steel, primarily low carbon steel, it is a gaseous process carried out in pit or sealed quench furnaces. It enables a hard, wear resistant case to be produced with a softer, tougher core. Carburising is carried out in the temperature range 920°C -960°C to achieve case depths from 0.25mm to 5.0mm, dependent on material selection.
Components up to 1120mm in diameter and 1.78m long can be treated vertically using special jigging to minimise distortion.
Carbonitriding is similar to gas carburising with the addition of ammonia to the carburising atmosphere, which provides a source of nitrogen. Nitrogen is absorbed at the surface and diffuses into the work-piece, along with carbon. Typical case depths are in the order of 0.15mm – 0.7mm working in a temperature range of 820°C to 940°C. Components are generally quenched in oil. Fast quench oils are available for lower hardenability steels. Molten salt is also available to minimise distortion.
Gleason Press quenches are available to ensure optimum dimensional control (ovality and flatness)
Programmable Logic Controllers (PLCs) and oxygen probes fitted to our furnaces enable temperature, atmospheres and cycle times to be controlled accurately and repeatedly.
Typical Materials that can be treated:-
Typically 080M15, 665M17, 832M13, AISI 1020, 8620, 17 NiCrMo6 “type” steels are treated, however many other steels can also be treated. Three speeds of oil (fast, medium and slow) are available to accommodate the range of steels treated.
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